> I got it. The answer I was looking for was: lam deamons are
> not in use anymore. mpirun does everything byitself as soon
> as all the path variables are set up correctly. However, what
> are the openIB and uDAPL warnings good for? E.g:

Sorry for the delay in replying.

> libibverbs: Fatal: couldn't read uverbs ABI version.
> --------------------------------------------------------------------------
> [0,1,1]: OpenIB on host neutrino was unable to find any HCAs.
> Another transport will be used instead, although this may result in
> lower performance.
> --------------------------------------------------------------------------
> --------------------------------------------------------------------------
> [0,1,1]: uDAPL on host neutrino was unable to find any NICs.
> Another transport will be used instead, although this may result in
> lower performance.
> --------------------------------------------------------------------------

The "couldn't read uverbs ABI" message *usually* means that you have a
busted OFED installation. Do you know if other InfiniBand
applications work on that(those) node(s)? Does the ibv_devinfo
application return any HCAs with active ports?